JPH0397746U - - Google Patents
Info
- Publication number
- JPH0397746U JPH0397746U JP1990004646U JP464690U JPH0397746U JP H0397746 U JPH0397746 U JP H0397746U JP 1990004646 U JP1990004646 U JP 1990004646U JP 464690 U JP464690 U JP 464690U JP H0397746 U JPH0397746 U JP H0397746U
- Authority
- JP
- Japan
- Prior art keywords
- icram
- card
- system memory
- write protection
- replacing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Storage Device Security (AREA)
Description
第１図は、本考案の一実施例のＩＣＲＡＭカー
ドをシステムメモリとして使用する場合のブロツ
ク図、第２図はライトプロテクト制御回路のブロ
ツク図を示す。
１……システムデータバス、２……システムア
ドレスバス、３……ローカルアドレスバス、４…
…ローカルデータバス、５……プロセツサ、６…
…アドレスデコーダ、７……ＩＣＲＡＭカード、
８……周辺Ｉ／Ｏインタフエースデバイス。
FIG. 1 shows a block diagram when an ICRAM card according to an embodiment of the present invention is used as a system memory, and FIG. 2 shows a block diagram of a write protection control circuit. 1...System data bus, 2...System address bus, 3...Local address bus, 4...
...Local data bus, 5...Processor, 6...
...Address decoder, 7...ICRAM card,
8... Peripheral I/O interface device.
Claims (1)
使用し、その交換により、容易にアプリケーシヨ
ンソフトの変更が可能な装置に於いて、 前記ＩＣＲＡＭカードの任意の領域について、
ライトプロテクト機能の設定を可能とすることを
特徴とする装置。[Claims for Utility Model Registration] In a device that uses an ICRAM card as a system memory and allows the application software to be easily changed by replacing the ICRAM card, with respect to any area of the ICRAM card,
A device characterized in that it is possible to set a write protection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990004646U JPH0397746U (en) | 1990-01-24 | 1990-01-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990004646U JPH0397746U (en) | 1990-01-24 | 1990-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0397746U true JPH0397746U (en) | 1991-10-08 |
Family
ID=31508382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990004646U Pending JPH0397746U (en) | 1990-01-24 | 1990-01-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0397746U (en) |
-
1990
- 1990-01-24 JP JP1990004646U patent/JPH0397746U/ja active Pending
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